Helppp me A,B,C,D I need help choose one for me

Answer:

1. D

2. G

3. C

4. A

Explanation:

An endothermic reaction is one that absorbs or uses heat energy. Its polar — er thermal — opposite, exothermic describes a reaction that makes or gives off heat. It can be easy to confuse the two, but if you can remember that endo means “in” and exo means "out,". Ectotherm, any so-called cold-blooded animal—that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates.

Larger animals can keep their heat for a longer time than smaller animals. A small animal has a greater surface area for its size compared to an adult animal. That is why small animal, as well as a baby, is more prone to heat loss. Larger animals can keep their heat for a longer time.

Answer:

your answer is carbohydrate

Answer:

An outbreak of a disease that infects squirrels in the park.

Explanation:

All the other answer choices would increase the population of squirrels. For the first option, more trees = more habitats = more squirrels to live in. For the second option, less hawks = less predators = more squirrels that will survive. For the third option, heavy rain = more acorns = more food for more squirrels.

Only the last option would limit the growth of a population of squirrels since diseases kill organisms in a population.

Answer:

Ethical:

-Giving a sick cow antibiotics.

-Euthanizing a horse suffering from an incurable disease and pain.

Unethical:

-Disclosing medical records of a patient without consent from the pet owner.

-Concealing information about a genetic defect from a dog breader.

Explanation:

In the field of veterinary medicine, ethics is a set of moral norms and mandates of conduct for veterinarians in which the welfare of the animal and the prevention of its suffering are prioritized, at the same time as the search for clear and detailed information regarding the use of animals for different purposes, be they commercial or otherwise. Thus, any activity that prevents the suffering of an animal will be considered ethical, at the same time that any activity that produces immediate or future suffering to an animal will be considered unethical.

Answer: The extinction of dinosaurs will lead to increase in the prey which they used to consume before extinction.

Explanation:

Many years ago the dinosaurs used to dominate on earth as large mammals. They were plant eater herbivores and animal consumer carnivores. After the extinction of dinosaurs the ecological balance got disturbed. Flowering plants dominated the earth. The large and massive non-bird dinosaurs died but the bird like dinosaurs survived and they passed their traits to some lineages of modern birds.

Answer:

D. Climate change

Explanation:

The carbon cycle is disrupted by several activities of man which includes burning if fossil fuels anong others. These leads to accumulation of huge amounts of carbon dioxide in the atmosphere which leads to global warming. The resultant effects of global warming is what one of the major cause of climate change.

Therefore, human disruption of the carbon cycle can be said to have been implicated in climate change.

Answer:

f :)

Explanation:

Answer:

because natural selection only acts on traits that impact reproductive success.

The answer is C. from areas of high pressure to areas of low pressure

Explanation:

Brine pools are sometimes called sea floor "lakes" because the dense brine does not easily mix with overlying seawater. The high salinity raises the density of the brine, which creates a distinct surface and shoreline for the pool. When submarines dive into brine pools, they float on the brine surface due to the high density

Complete question:

Both species of garter snakes prey on the California newt. Taricha torso, small amphibian that produces a potent neurotoxin (TTX) in its skin. However, neither species of garter snake is affected by TTX. The resistance to TTX is associated with mutations in the SCN4A gene. which of the following best supports a claim that TTX resistance arose independently in T. atratus and T. sirtalis?    

A. The stomach contents in fossils of both species include the remains of food items that contains TTX.

B. Both species of snakes possess the SCN4A gene.

C. The two species of snakes have different genetic mutations in the SCN4A gene.

D. T. atratus and T. sirtalis are sister species that share many of the same morphological features.

Answer:

C. The two species of snakes have different genetic mutations in the SCN4A gene.

Explanation:  

These are two different species that feed on the same amphibian species and that developed resistance to TTX. Resistance to the toxic is associated with mutations in the SCN4A gene. So probably both species by separated developed different mutations in the gene that led them to be resistant to the toxin.

Supporting the fact that natural selection is not random, both species might have become resistant to TTX through different mutations in the same gene. Both species are feeding on the California newt that produces neurotoxin in the skin. Animals that feed on this amphibian need to be resistant to the toxin to avoid death and keep preying. TTX might be acting as a modeling pressure that led snakes to develop resistance to the toxin, favoring the same phenotype but independently.

A. The stomach contents in fossils of both species include the remains of food items that contain TTX. → Food items with TTX in the stomachs do not mean that species were resistant to the toxin. And if they were, it does not mean that species developed the resistance independently or not.

B. Both species of snakes possess the SCN4A gene. → The fact that both species have the gene does not mean that they have mutations in the gene

C. The two species of snakes have different genetic mutations in the SCN4A gene. → That both species have different mutations in the same gene means that they evolved independently from each other. They suffered different mutations in the same gene that led them to express the same resistance phenotype.  

D. T. atratus and T. sirtalis are sister species that share many of the same morphological features. → Morphological features do not necessarily reflect molecular features. The fact that they are similar sister species does not say anything about the SCN4A gene.

The condition that best supports this experiment is the two species of snakes have different genetic mutations in the gene described above.

Mutations may be defined as sudden, stable, and inheritable changes in the genetic material of an organism.  

Both species of snake have different mutations in the same gene means that they evolved independently from each other. They undergo different mutations in the same gene that led them to express the same resistance phenotype.

Therefore, the condition that best supports this experiment is the two species of snakes have different genetic mutations in the gene described above.

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Answer:

country b will have high level of poverty

Answer:

“Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants, depletion of fish species, general deterioration of water quality and other effects that reduce and preclude use”.

Explanation:

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Answer:

recombinat DNA , epidemiology,

Answer:

Hope it helps

Explanation:

The label A represents mitochondria.

The mitochondria are also called the powerhouse of the cell which converts glucose to energy-rich molecules of ATP.

Label B represents the nucleus.

The nucleus contains the genetic material or DNA, RNA, nucleolus, chromatin fibers, and proteins. It contains the chromosomes which control the hereditary characteristics.

Label C represents the lysosome.

Lysosomes contain digestive juices which break down large cell parts and large molecules and help in intracellular digestion.

Label D represents rough endoplasmic reticulum having ribosomes.

The rough endoplasmic reticulum provides a surface for protein synthesis. It is also used to transport cellular contents from one cell to another.

Answer:

c.Hypotension indicates good health

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Answer:because when the sperm and the egg fuse together the cell will have 46 chromosomes.

Answer:

It is important that chromosomes are haploids because when the sperm and the egg fuse together the cell will have 46 chromosomes. polar bodies are haploid cells produced during meiosis which are smaller in size compared to the gamete and will disintegrate

Explanation:

Hope this helped Mark BRAINLIEST!!!

Answer:

A. learned through imitation and reinforcement

Explanation:

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According to the behaviorist theories of language acquisition, language is learned through imitation and reinforcement. The correct option is A.

The central tenet of behaviorism is that all actions are acquired through interactions with the environment. According to this learning theory, environmental circumstances have a much greater impact on behavior than innate or inherited traits.

Skinner (1985) equated learning a language to verbal behavior in accordance with behaviorist theory. Instead, of attempting to explain the brain structures that underlie these kinds of activities, language acquisition can be observed, just like any other behavior.

Therefore, the correct option is A. learned through imitation and reinforcement.

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Answer:

The most common volcanic gases are water vapour, carbon dioxide, sulfur dioxide, and hydrogen sulfide. Small quantities of other volatile elements and compounds also are present, such as hydrogen, helium, nitrogen, hydrogen chloride, hydrogen fluoride, and mercury.

Answer:

by using molecular clocks which are based on the mutation rates among molecular sequences (e.g., DNA sequences). The mutation ​rate can be used to estimate the times of divergence between sequences (in this case, between duplicated sequences in the target species and non-duplicated sequences in the most recent common ancestor).

Explanation:

A molecular clock is a technique that uses the mutation rate (μ) to measure the association between evolutionary rate and time. A mutation rate can be used to estimate the time in prehistory when two or more molecular sequences diverged. For example, assuming a generation time of 20 years, a species that has 100 mutations per generation is divided by 20 years to yield a mutation rate equal to 5 mutations per year. In consequence, the times of divergence can be estimated by dividing half of the target genomic region length (in nucleotides) by the mutation rate (t = d/2 ÷ μ).

Answer:

calculating the amount of product formed over time while the amount of product is increasing in a linear manner. ( B )

Explanation:

The initial velocity of an enzyme catalyzed reaction is determined by Calculating the amount of product formed over time while the amount of product is increasing in a linear manner

Initial Velocity of an enzyme is the described in relation to the amount of product produced per unit time at the beginning of a reaction.

The initial velocity of an enzyme reaction is determined by calculating the amount of product over time while it is increasing in a linear manner (Option B).

An enzyme is a protein that may act as a biological catalyst for a particular chemical reaction.

In conclusion, the initial velocity of an enzyme reaction is determined by calculating the amount of product over time while it is increasing in a linear manner (Option B).

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Answer:

C

Explanation:

Increased biodiversity helps diminish reliance on one species

Greater stability of the biosphere would most likely result from increased biodiversity (Option C).

In conclusion, greater stability of the biosphere would most likely result from increased biodiversity (Option C).

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Answer: If its iq based then it would be William James

Explanation:

Answer:

The Earth is 4.6 billion years old. Some examples of events listed on the geologic time scale include the first appearance of plant life on Earth, the first appearance of animals on Earth, the formation of Earth's mountains, and the extinction of the dinosaurs.

Explanation:

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